A large-cavity multi-section rotor structure suitable for wheel hub electric drive

Abstract

The application belongs to the technical field of hub electric drive, and particularly relates to a large-capacity inner cavity multi-section motor rotor structure suitable for hub electric drive, comprising a first pressing plate, a first section rotor iron core, a second section rotor iron core, a third section rotor iron core, a second pressing plate, a first rivet, a bolt, a rotating shaft, a second rivet and a magnetic steel; compared with the prior art, the rotor iron core is designed into three sections with different thicknesses, the iron core is fixed by being pressed tightly through the bolt and the rivet, so that the overall structure of the motor has high compactness; the shape of the motor rotor iron core and the connection mode of the iron core and the rotating shaft are adjusted, so that the space utilization rate of the motor structure is higher, and more space is provided for the installation of other mechanical devices.

Description

Technical Field

[0001] This invention belongs to the field of hub electric drive technology, specifically relating to a high-capacity internal cavity multi-segment motor rotor structure suitable for hub electric drive. Background Technology

[0002] Compared to traditional drive systems, in-wheel electric drive systems can replace traditional powertrains, simplify chassis structure, maximize interior space, and make the overall vehicle layout more flexible. Within the limited space inside the wheel rim, the motor, transmission / reduction mechanism, and brakes must be integrated. Simultaneously, heat dissipation and lubrication, as well as the suspension connection between the electric drive wheel and the vehicle body, must be considered. Therefore, in-wheel electric motor drive systems require a highly compact spatial layout. In common motor rotor structures, the rotor core has a uniform thickness, and a support sleeve is needed to connect and fix the core to the shaft. The space utilization of the motor structure needs improvement, and the small rotor cavity presents challenges for the installation of other components. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] The technical problem to be solved by this invention is: how to provide a rotor structure that makes the motor more compact and has a higher space utilization rate.

[0005] (II) Technical Solution

[0006] To solve the above technical problems, the present invention provides a large-capacity internal cavity multi-segment motor rotor structure suitable for hub electric drive. The motor rotor structure includes: a first pressure plate 1, a first segment rotor core 2, a second segment rotor core 3, a third segment rotor core 4, a second pressure plate 5, a first rivet 6, a bolt 7, a rotating shaft 8, a second rivet 9, and a magnet 10.

[0007] The first pressure plate 1 is connected to the first rotor core 2; the first rotor core 2 is connected to the second rotor core 3; the second rotor core 3 is connected to the third rotor core 4; the third rotor core 4 is connected to the second pressure plate 5; the first rivet 6 and the second rivet 9 press and fix the first pressure plate 1, the first rotor core 2, the second rotor core 3, the third rotor core 4, and the second pressure plate 5; the second rotor core 3 is connected to the rotating shaft 8; the bolt 7 fixes the second rotor core 3 and the rotating shaft 8; the magnet 10 is connected to the first rotor core 2, the second rotor core 3, and the third rotor core 4.

[0008] The first rotor core 2, the second rotor core 3, and the third rotor core 4 are located on the periphery of the rotor structure, and the three rotor cores are connected sequentially along the axial direction.

[0009] In the axial direction, the direction from the second rotor core 3 toward the first rotor core 2 is defined as the front, and the direction from the second rotor core 3 toward the third rotor core 4 is defined as the rear.

[0010] Therefore, at the axial front end of the first section of rotor core 2, the first pressure plate 1 is provided to press and fix it;

[0011] At the rear axial end of the third rotor core 4, a second pressure plate 5 is provided to press and fix it.

[0012] Thus, through the opposing pressing action of the first pressure plate 1 and the second pressure plate 5, the combination consisting of the first rotor core 2, the second rotor core 3, and the third rotor core 4 is axially pressed and fixed.

[0013] Both the first pressure plate 1 and the second pressure plate 5 are circular ring plates.

[0014] The first rivet 6 and the second rivet 9 are provided in multiples, evenly distributed on the circumferential edge of the rotor structure, and pass through the first pressure plate 1 and the second pressure plate 5 along the axial direction; thereby realizing the joint action of the first rivet 6 and the second rivet 9 to press and fix the first pressure plate 1, the first section of rotor core 2, the second section of rotor core 3, the third section of rotor core 4, and the second pressure plate 5.

[0015] Wherein, the first rivet 6 and the second rivet 9 are set to pass through each other in opposite directions. That is, when the first rivet 6 is set to pass through the first pressure plate 1 first and then through the second pressure plate 5, the second rivet 9 is set to pass through the second pressure plate 5 first and then through the first pressure plate 1.

[0016] The first section of rotor core 2, the second section of rotor core 3, and the third section of rotor core 4 have different thicknesses as they extend radially, with the first section of rotor core 2 and the third section of rotor core 4 being thinner than the second section of rotor core 3.

[0017] The second rotor core 3, which protrudes radially from the first rotor core 2 and the third rotor core 4, has axial bolt mounting holes.

[0018] The rotating shaft 8 is disposed in the central cavity formed by the first pressure plate 1, the first section of rotor core 2, the second section of rotor core 3, the third section of rotor core 4, and the second pressure plate 5.

[0019] The portion of the second rotor core 3 that protrudes radially from the first rotor core 2 and the third rotor core 4 is fixed to the shaft 8 by mounting bolts 7.

[0020] The magnet 10 is disposed on the outer wall of the first rotor core 2, the second rotor core 3, and the third rotor core 4, and extends axially to connect the three rotor cores from the outside and achieve radial limiting.

[0021] (III) Beneficial Effects

[0022] Compared with the prior art, the present invention divides the rotor core into segments and connects and fixes the longer second segment of the rotor core to the shaft with bolts, eliminating the need for the core support sleeve, thus making the motor have a more compact structure, increasing the rotor cavity and improving space utilization.

[0023] Specifically, the present invention designs the rotor core into three sections of different thicknesses, and uses bolts and rivets to press and fix the core, so that the overall structure of the motor has high compactness. The present invention adjusts the shape of the motor rotor core and the connection method between the core and the shaft, so that the space utilization of the motor structure is higher, providing more space for the installation of other mechanical devices. Attached Figure Description

[0024] Figure 1 This is a cross-sectional schematic diagram of a large-capacity internal cavity rotor structure suitable for hub electric drive according to the present invention.

[0025] Figure 2 , Figure 3 This is a three-dimensional diagram of a large-capacity internal cavity rotor structure suitable for hub electric drive according to the present invention. Detailed Implementation

[0026] To make the objectives, contents, and advantages of the present invention clearer, the specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0027] To solve the above-mentioned technical problems, the present invention provides a high-capacity, multi-segment internal cavity motor rotor structure suitable for hub electric drives, such as... Figure 1 , Figure 2 and Figure 3 As shown, the motor rotor structure includes: a first pressure plate 1, a first rotor core 2, a second rotor core 3, a third rotor core 4, a second pressure plate 5, a first rivet 6, a bolt 7, a rotating shaft 8, a second rivet 9, and a magnet 10.

[0028] The first pressure plate 1 is connected to the first rotor core 2; the first rotor core 2 is connected to the second rotor core 3; the second rotor core 3 is connected to the third rotor core 4; the third rotor core 4 is connected to the second pressure plate 5; the first rivet 6 and the second rivet 9 press and fix the first pressure plate 1, the first rotor core 2, the second rotor core 3, the third rotor core 4, and the second pressure plate 5; the second rotor core 3 is connected to the rotating shaft 8; the bolt 7 fixes the second rotor core 3 and the rotating shaft 8; the magnet 10 is connected to the first rotor core 2, the second rotor core 3, and the third rotor core 4.

[0029] The first rotor core 2, the second rotor core 3, and the third rotor core 4 are located on the periphery of the rotor structure, and the three rotor cores are connected sequentially along the axial direction.

[0030] In the axial direction, the direction from the second rotor core 3 toward the first rotor core 2 is defined as the front, and the direction from the second rotor core 3 toward the third rotor core 4 is defined as the rear.

[0031] Therefore, at the axial front end of the first section of rotor core 2, the first pressure plate 1 is provided to press and fix it;

[0032] At the rear axial end of the third rotor core 4, a second pressure plate 5 is provided to press and fix it.

[0033] Thus, through the opposing pressing action of the first pressure plate 1 and the second pressure plate 5, the combination consisting of the first rotor core 2, the second rotor core 3, and the third rotor core 4 is axially pressed and fixed.

[0034] Both the first pressure plate 1 and the second pressure plate 5 are circular ring plates.

[0035] The first rivet 6 and the second rivet 9 are provided in multiples, evenly distributed on the circumferential edge of the rotor structure, and pass through the first pressure plate 1 and the second pressure plate 5 along the axial direction; thereby realizing the joint action of the first rivet 6 and the second rivet 9 to press and fix the first pressure plate 1, the first section of rotor core 2, the second section of rotor core 3, the third section of rotor core 4, and the second pressure plate 5.

[0036] Wherein, the first rivet 6 and the second rivet 9 are set to pass through each other in opposite directions. That is, when the first rivet 6 is set to pass through the first pressure plate 1 first and then through the second pressure plate 5, the second rivet 9 is set to pass through the second pressure plate 5 first and then through the first pressure plate 1.

[0037] The first section of rotor core 2, the second section of rotor core 3, and the third section of rotor core 4 have different thicknesses as they extend radially, with the first section of rotor core 2 and the third section of rotor core 4 being thinner than the second section of rotor core 3.

[0038] The second rotor core 3, which protrudes radially from the first rotor core 2 and the third rotor core 4, has axial bolt mounting holes.

[0039] The rotating shaft 8 is disposed in the central cavity formed by the first pressure plate 1, the first section of rotor core 2, the second section of rotor core 3, the third section of rotor core 4, and the second pressure plate 5.

[0040] The portion of the second rotor core 3 that protrudes radially from the first rotor core 2 and the third rotor core 4 is fixed to the shaft 8 by mounting bolts 7.

[0041] The magnet 10 is disposed on the outer wall of the first rotor core 2, the second rotor core 3, and the third rotor core 4, and extends axially to connect the three rotor cores from the outside and achieve radial limiting.

[0042] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A high-capacity, multi-segment internal cavity motor rotor structure suitable for hub electric drive, characterized in that, The motor rotor structure includes: a first pressure plate (1), a first rotor core (2), a second rotor core (3), a third rotor core (4), a second pressure plate (5), a first rivet (6), a bolt (7), a rotating shaft (8), a second rivet (9), and a magnet (10). The first pressure plate (1) is connected to the first rotor core (2); the first rotor core (2) is connected to the second rotor core (3); the second rotor core (3) is connected to the third rotor core (4); the third rotor core (4) is connected to the second pressure plate (5); the first rivet (6) and the second rivet (9) press and fix the first pressure plate (1), the first rotor core (2), the second rotor core (3), the third rotor core (4), and the second pressure plate (5); the second rotor core (3) is connected to the shaft (8); the bolt (7) fixes the second rotor core (3) and the shaft (8); the magnet (10) is connected to the first rotor core (2), the second rotor core (3), and the third rotor core (4); Among them, the first section of rotor core (2), the second section of rotor core (3), and the third section of rotor core (4) have different thicknesses along the radial extension, and the first section of rotor core (2) and the third section of rotor core (4) are thinner than the second section of rotor core (3). Among them, the part of the second section of rotor core (3) that protrudes radially from the first section of rotor core (2) and the third section of rotor core (4) is provided with axial bolt mounting holes; The rotating shaft (8) is located in the central cavity formed by the first pressure plate (1), the first section of rotor core (2), the second section of rotor core (3), the third section of rotor core (4), and the second pressure plate (5); The portion of the second rotor core (3) that protrudes radially from the first rotor core (2) and the third rotor core (4) is fixed to the shaft (8) by mounting bolts (7).

2. The high-capacity, multi-segment internal cavity motor rotor structure suitable for hub electric drive as described in claim 1, characterized in that, The first rotor core (2), the second rotor core (3), and the third rotor core (4) are located on the periphery of the rotor structure and are connected sequentially along the axial direction.

3. The high-capacity, multi-segment internal cavity motor rotor structure suitable for hub electric drive as described in claim 2, characterized in that, In the axial direction, the direction from the second rotor core (3) toward the first rotor core (2) is defined as the front, and the direction from the second rotor core (3) toward the third rotor core (4) is defined as the rear. Therefore, at the axial front end of the first section of rotor core (2), the first pressure plate (1) is provided to press and fix it; At the axial rear end of the third rotor core (4), a second pressure plate (5) is provided to press and fix it; Thus, through the opposing pressing action of the first pressure plate (1) and the second pressure plate (5) in the axial direction, the combination consisting of the first rotor core (2), the second rotor core (3), and the third rotor core (4) is axially pressed and fixed.

4. The high-capacity, multi-segment internal cavity motor rotor structure suitable for hub electric drive as described in claim 3, characterized in that, Both the first pressure plate (1) and the second pressure plate (5) are circular ring plates.

5. The high-capacity, multi-segment internal cavity motor rotor structure suitable for hub electric drive as described in claim 4, characterized in that, The first rivet (6) and the second rivet (9) are provided in multiples and are evenly distributed on the circumferential edge of the rotor structure, passing through the first pressure plate (1) and the second pressure plate (5) along the axial direction; thereby realizing the joint action of the first rivet (6) and the second rivet (9) to press and fix the first pressure plate (1), the first section of rotor core (2), the second section of rotor core (3), the third section of rotor core (4), and the second pressure plate (5).

6. The high-capacity, multi-segment internal cavity motor rotor structure suitable for hub electric drive as described in claim 5, characterized in that, The first rivet (6) and the second rivet (9) are set to pass through each other in opposite directions. That is, when the first rivet (6) is set to pass through the first pressure plate (1) first and then through the second pressure plate (5), the second rivet (9) is set to pass through the second pressure plate (5) first and then through the first pressure plate (1).

7. The high-capacity, multi-segment internal cavity motor rotor structure suitable for hub electric drive as described in claim 6, characterized in that, The magnet (10) is disposed on the outer wall of the first rotor core (2), the second rotor core (3), and the third rotor core (4), extending axially to connect the first rotor core (2), the second rotor core (3), and the third rotor core (4) from the outside and to achieve radial limiting.

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